The Flange,pipe, cataloged under National Stock Number 4730-00-252-3556, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-252-3556 |
| Primary Part Number | 74D104 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Flange Diameter | 4.312 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Nominal Pipe Size for Which Designed | 1.250 INCHES IN |
| Flange Section Style | PLAIN FACE, RAISED NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.406 INCHES NOMINAL IN |
| Neck Height | 0.469 INCHES NOMINAL IN |
| Nominal Thread Size | 1.250 INCHES IN |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 3.312 INCHES NOMINAL IN |
| Screw Thread Series Designator | NPT |
| Material | COPPER ALLOY |
| Thickness | 0.281 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 74D104 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| S22685-1 1/4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-252-3556 is a Flange,pipe, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-252-3556 has 1 manufacturer part number on file: 74D104 (Derbyshire Machine & Tool Co).
1 possible match (shared part number, not a government interchangeability claim): 2915-01-037-6728. Verify interchangeability with system specifications before substitution.
Key specifications for 74D104: Flange Diameter: 4.312 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Nominal Pipe Size for Which Designed: 1.250 INCHES IN; Flange Section Style: PLAIN FACE, RAISED NECK. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.